// pages/songRecommend/songRecommend.js
import request from '../../utils/request';
import Pubsub from 'pubsub-js';

Page({

  /**
   * 页面的初始数据
   */
  data: {
    day: '',
    month: '',
    recommendList: [],
    index: 0
  },

  toSongDetail(event) {
    let { song, index } = event.currentTarget.dataset;
    this.setData({ index });

    console.log(index);

    wx.navigateTo({
      url: '/pages/songDetail/songDetail?id=' + song.id,
    })
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    let userInfo = wx.getStorageSync('userInfo');
    if (!userInfo) {
      wx.showToast({
        title: '请先登录',
        icon: 'none',
        success: () => {
          // 跳转至登录界面
          wx.reLaunch({
            url: '/pages/login/login'
          })
        }
      })
    }

    this.setData({
      day: new Date().getDate(),
      month: new Date().getMonth() + 1
    });

    this.getRecommendList();

    let index = this.data.index;

    Pubsub.subscribe('switchType', (msg, type) => {
      if (type === 'pre') {
        (index === 0) && (index = this.data.recommendList.length);
        index -= 1;
      } else { // 下一首
        (index === this.data.recommendList.length - 1) && (index = -1);
        index += 1;
      }

      this.setData({ index });

      let musicId = this.data.recommendList[index].id;

      Pubsub.publish('musicId', musicId);
    });
  },

  async getRecommendList() {
    let recommendListData = await request('/recommend/songs');

    this.setData({
      recommendList: recommendListData.data.dailySongs
    })
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  }
})